Reversible rotary pump.



F. D. KmscH.

.. REVERSIBLE ROTARY PUMP.

APPLICATION FILED APR. 9, 1914.

Patented May 9,1916.

, UNITE j sra'rns raf-raar ritieni j,

FRANCIS D. Kiiiscn, OFCHERRY Tiana,` rENNsYLVANIA.

yTo all '107mm t may concern.' 1

Be it known that I, FRANCIS D. Kissen, a citizenv o f the United States, residing at Cherry Tree, in the county of Indiana and State of' Pennsylvania, have invented certain new and usefulImprovements inv ReversiblelRota-ry Pumps, of which thel following is a specification. l

This invention relates to pumpsof the rotary piston type, and the objectsare to provide a reversible rotary pump having no stuffing-box or similar packing joints whereby there is effected considerable4 savingI in the first cost as well as tliecost ofl ina'intenance and repairs; to provide a pump cas-l inghaving detachable' heads provided with openings, which constitute fluid supply and discharge connections, and having their coliffronting faces dished 'or concaved or of arcuate form; tor provide a rotary pump or .piston in the :form of a screw whereof the terminals are nested so `to speak in the'concavities of the casingheads and hence also obtrude upon the fluid supply and discharge passages so that there is no break or interruption in the motive or inipelling action andthe pump is caused to work'at maxig mum efficiency; and to provide a screw shaft AFig. 2 is a longitudinalsectional elevational 'view of the same.

having shoulders or abutments, which cooperate with flanged bushings in the casing heads Ato take the thrust ofthe shaft and to obviate-the necessity of packing glands.

With these and other objects in view, the nature, characteristic featuresand scope of the invention will more readily be understood, from the following detailed description taken in connection with the accompanying drawing, forming a part hereof, whereiny Figurel is a perspective view of a pump embodying features ,of my invention; and

Referring,r to the drawing, the numeral 5 designates' a cylindrical pump. casing, which may be mounted in any suitable manner, for example. horizontally on the benches 6, and which is provided .with flanges 7 for the attachment of the `heads 8. The-latter are heavy castings having axial openings 9 to accommodate the shaft, and openings 10, which constitute, respectively, fluid supply and discharge connections according to the direction of flow. The heads have a part 11, which telescopes the pump casing, and,

flanges 12 adapted to be secured to the cas-v REvEnsBLE ROTARY PUMP.

speqi'scation pf Letters Patent.

Yexampleby a belt pulley 23.

Having described the nature and objects,

.to prevent leakage.

Patented Mayo, 1.916.

'Applicationled April 9, 1914. Serial No. SIS-0,598.

ing flanges as by bolts 13.- The annular part or shoulder ll constitutes a seat for Ia' packing ring or gasket 14. The heads have their inner or confronting faces dished or `concaved or of arcuate form in cross-'section, as indicated 'at l5, ihe arc passing through the' fluid passages so that the terminals 16` of the screw, which are of like arc.

.form or contour, arenested or snugly fitted 1n the concavities l5 and in their ,course of travel sweep through the uid passagesl so' that there is a. constant unobstructed flow with no loss or wastage of mechanical eneroytllie 'axial or shaft openings 9 are equipped with-bushings l? of Babbitt or other suit Y able anti-friction metal, said bushings constituting bearings for theshaft 18 and having flanges 19, which bear against shoulders Q0. The shaft and' its screw lmay be integrally formed and the diameter of the screw issubstantially the same as the inner diameter of the pump casing.' The screw is generally provided with three iinpellers, namely. the terminals 16 and a medial ineinbei'.`

Theshaft is provided'at each terminal end with'an annular shoulder or abutnient 21, which'is accommodated in a recess Q2. The ends of theabutments' bear against.,

the'flanged ends of the soft'metal bushings,

which consequently take the thrust of the shaft and also coperate withtheftraveling abutments to prevent leakage. The shaft may be driven in any 'suitable manner, for

ca sing and having its terminal blades nested in the concavities thereof, and having abutments Vwhich coperate with the ends of the casingto take the thrust of the shaft and 2. The combination of a pump casing,

casing hea-ds provided with fiuid passagesv and havingtheir confronting faces of arcuate form, and a rotary pump mounted 1n said casing and having arc shape termi' nals adapted to said faces so that their rotative path is through said passages.

3.'The combination of a shaft providedv with a screw having arc like terminals and Q v niegan annular shoulders or abutments near the bushings coperatie With the abutments to l@ termlna-l. ends, a. pump casing including take the hrust of the shaft and prevent heads having arcuate form confronting leakage 'I the screw terminals, said heads having axial in presence of two Witnesses. l

openings for the shaft, and flanged bush? y FRANCIS D. KIRSCH.

ings of anti-friction metal innerijying said Vihnesses: l

openings and constituting bearings for 'the y JOHN M. Bynns, shaft,'tl1e arrangement being such that vhe Cn'rns SoIssoN.

faces and fluid connections in the path of )In testimony whereof I affix my signature 

